Simultaneous recording of 40+ channels

[KamilT]

Hi, I'd like to build up a setup that could record a lot of SAT channels. I'd like to achieve it with 1 PC running 24/7. I've got DVBViewer Pro license with Media Server which I'd like to use. I'd like to record at least 40 channels at once (up to 16 transponders), all uncoded (maybe CI modules in future).

 

I'm wondering about:

1. Basics (I'll ask company that install this for recommedations so no worries about it)
   1. SAT dish 140 CM with heating
   2. 2x Quattro inverter (for 2 SATs)
   3. Multiswitch
   4. Cabling
2. 2x Digital Devices Max SX8 Pro (4/8) - DD used to serve me well unless you have any other recommendations?
3. PC - this is hard part for me. What should I look for here? When I recorded a lot of stuff before I didn't see a lot of load on the system, but I want it to be safe setup. I'm thinking about i7 14700, 64 gb of RAM, 1 GB m.2 gen4 ssd (no need to store recs too long). Is that enough power? I don't do any encoding, I save it as is into TS format.

[Griga]

IMO CPU power is not that important for recording. But you should try to estimate the overall data rate of x recordings simultaneously written to disk.

 

Let's assume 40 HD channels with 10 MBit/s each, yielding 400 MBit/s = 47.7 MB/s. That could already be too much for a normal HDD. Please note that you need to consider the maximum random write data rate of the medium that is supposed to store the recordings, not the sequential write data rate, because you'll get a lot of fragmentation if 40 huge files are written at the same time. With the following command line (requires admin rights, more about it here)

 

winsat disk -ran -write -drive d

 

Windows reports a random write data rate of about 27 MB/s for my HDD D:\. That wouldn't be sufficient for your purpose and would cause buffer overflows in the DVBViewer / Media Server recorder.

 

[KamilT]

Hi, thanks for confirming my thoughts. gen4 ssd will be enough.